zip vs pair of trousers

zip and pair of trousers both are nouns.

Word	Noun	Adjective	Verb	Adverb
zip	Yes	No	Yes	No
pair of trousers	Yes	No	No	No

zip (noun)	pair of trousers (noun)
a fastener for locking together two toothed edges by means of a sliding tab	(usually in the plural) a garment extending from the waist to the knee or ankle, covering each leg separately
forceful exertion
a quantity of no importance; thing (object:), singular, negative pronoun; pronoun, thing, singular; quantifier: negative existential

zip (verb)	pair of trousers (verb)
close with a zipper
move very fast